> For the complete documentation index, see [llms.txt](https://docs.mashmatrix.com/mashmatrix-sheet/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.mashmatrix.com/mashmatrix-sheet/functions_advanced/time_series_matrix_transformation/delete_child_column.md).

# Delete Child Column

To delete a column inside a matrix column, select "Delete Column" from the menu of the child column header you want to delete.

{% hint style="warning" %}
A matrix column must have at least one child column.
{% endhint %}